{
  "manageEntity": {
    "action": "Save",
    "entityId": "2109295315",
    "entityType": "Track",
    "nonce": "0x794c620ec8b3988630f607954b7f83373093296d0095b8464389cfc6b4ab55b4",
    "signature": "0xe5f42209ea16340aea488a22a851c026180894006cf6361c118dd5038bbb341b083df03f80c46ef2363cd228b218d51601cac8452515c9a7ce44ffcdb11dd10b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}